« It is recommended to keep closed the Masaya Volcano National Park to protect visitors, » saidMurillo.Masaya Volcanois one of themost visitedin Nicaragua, because you caneasily reachthe crater.In recent months, he has seenan increase in its activity so thatthe authorities closedexcursionsto tourists.

During thisperiod,sixty-two (62)seismicevents were recorded,thirty-three (33)were classified asvolcano-tectonic(VT)associated withrigid materialsfracturing processes.
Similarly, twenty-nine (29) were recordedas eventsassociated with thefluid dynamics inside the volcano andwereidentified asvolcanicearthquakeslongperiod(LP) and very long period (VLP).

Concerningthe seismic activity, the local magnitudes (ML) do not exceedM 2.2 . The higher energy event was located on the North-East side (ENE) at 12.4 km of the crater ElAgrio, at a depth of 8.4 km.Concerning the events related to fluid dynamics (LP), they presentedlocal magnitudes (ML) belowM1,9andareduceddisplacement value(DRC)below7,7cm2.VLPs events presentedlocal magnitudes(ML)belowM1,5andreduceddisplacement value (DRC) of less than10.4cm2.These eventsare located around thecrater.Throughout the month, there was a constant tremor signal, primarily associated with the release of particulate matter (gas and ash) of El Agrio crater, recording DRC oscillating values ​​generally below 3cm2, values ​​considered as intermediate for this volcano. The dominant frequencies are concentrated in a bandwidth between 1 and 2 Hz.

From the data obtained from five (5) GNSS stations, which seek to measure the deformation of the surface of the volcano, it was observed that the horizontal and vertical components showed variations in a small scale, with a tendency to hold rates previously reported. The highest rate of change of the vertical components is at 0.2cm / month, recorded at the nearest station of the crater. Compared to the line that crosses the volcano, it was observed that this low value showed no changes, remaining stable over the period.

Although a downward trend of seismic energy is recorded by the volcano monitoring indicators described above, they indicate the continuation of the activity associated with the interaction of a magma body of small volume, at more or less deep levels under the volcano and the volcanic hydrothermal system , without unbalancing the system, keeping it in what is called a « meta-stable » balance. This activity may continue for a long period with an oscillating manner, without excluding specific increases related to small phreatic explosions and / or low strombolian activity in the crater area. Therefore, the limitation of access to the proximal zone of a radius of 1.5 km around the crater El Agrio is recommended. The level of technical alert level remains at Yellow.SERNAGEOMIN -OVDAS continues to be alert, and report timely to the changes in the activity that may occur.

Source :SERNAGEOMIN -OVDAS

Yellowstone , United – States :

In response tosome press reports, here’s a clarification.The onlyreliable dataarethose from thevolcano observatories. For the UnitedStates, you can visit:

SeismicityDuring March 2016, the University of Utah Seismograph Stations, responsible for the operation and analysis of the Yellowstone Seismic Network, reports 49 earthquakes were located in the Yellowstone National Park (YNP) region. The largest event was a micro earthquake of magnitude 2.3 on March 26, 02:28 AM MDT, located 9 miles northeast of Norris Geyser Basin, YNP.March 2016 seismicity did not include any earthquake swarms. Yellowstone earthquake activity in March is at low background levels.

Ground deformation

GPS stations in Yellowstone continue to show little or no ground movement.

The Yellowstone Volcano Observatory (YVO) provides long-term monitoring of volcanic and earthquake activity in the Yellowstone National Park region. Yellowstone is the site of the largest and most diverse collection of natural thermal features in the world and the first National Park. YVO is one of the five USGS Volcano Observatories that monitor volcanoes within the United States for science and public safety.